Postbiotic Metabolites of Probiotics in Animal Feeding

The gut is consistently exposed to broad harmful pathogens from the external environment. It also acts as a barrier against infections, involves in digestion, nutrient absorption, and immune response. Any disruption and dysfunction in the gut microenvironment can cause huge implications on the general well-being of the host. Hence, a good gut health, which is an integral component of the diet, gut microbiota, and intestinal mucus layer, is vital to maintain the normal function of physiological and metabolic activities in the body. In this chapter, we highlighted the positive effects of supplementation of dietary postbiotic on growth performance, gut microbiota, intestinal morphology, immune response, meat quality, and expression of genes related to the barrier function and immunity in livestock. The inclusion of antibiotic growth promoters to achieve good intestinal health and performance which led to the emergence of antibiotic resistance gene and antibiotic residue level in the food product as well as beneficial compounds detected in the postbiotic are discussed in more detail.